A5082088414- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Photonic and Optical Devices
- Ferroelectric and Piezoelectric Materials
- Enhanced Oil Recovery Techniques
- Hydrocarbon exploration and reservoir analysis
- Advanced Condensed Matter Physics
- Civil and Geotechnical Engineering Research
- Tribology and Lubrication Engineering
- ZnO doping and properties
- Geomechanics and Mining Engineering
- Wireless Communication Networks Research
- Geotechnical Engineering and Underground Structures
- Gear and Bearing Dynamics Analysis
- Advanced Wireless Network Optimization
- Spectroscopy and Laser Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Sensor and Energy Harvesting Materials
- Optical Network Technologies
- Advanced Wireless Communication Techniques
- Magnetic Properties and Synthesis of Ferrites
- High-Temperature Coating Behaviors
- Metamaterials and Metasurfaces Applications
- Advanced Fiber Laser Technologies
- Electromagnetic wave absorption materials
Hebei University of Technology
2021-2023
Shijiazhuang Tiedao University
2019-2022
Zhejiang Wanli University
2021
Northeast Petroleum University
2014-2021
University of Nottingham Ningbo China
2020
Purdue University West Lafayette
2017-2019
Texas A&M University
2015-2017
Nanjing University of Aeronautics and Astronautics
2017
Soochow University
2017
Daqing Oilfield General Hospital
2016
Metamaterials made of nanoscale inclusions or artificial unit cells exhibit exotic optical properties that do not exist in natural materials. Promising applications, such as super-resolution imaging, cloaking, hyperbolic propagation, and ultrafast phase velocities have been demonstrated based on mostly micrometer-scale metamaterials few metamaterials. To date, most are created using costly tedious fabrication techniques with limited paths toward reliable large-scale fabrication. In this...
Vanadium dioxide (VO2) thin films with controlled thicknesses are deposited on c-cut sapphire substrates Al-doped ZnO (AZO) buffer layers by pulsed laser deposition. The surface roughness of AZO is varied controlling oxygen pressure during growth. strain in the VO2 lattice found to be dependent thickness and VO2/AZO interface roughness. semiconductor-to-metal transition (SMT) properties characterized temperature (Tc) successfully tuned as well It shows that Tc decreases decrease film or...
Abstract Resistive switches are non-volatile memory cells based on nano-ionic redox processes that offer energy efficient device architectures and open pathways to neuromorphics cognitive computing. However, channel formation typically requires an irreversible, not well controlled electroforming process, giving difficulty independently control ionic electronic properties. The performance is also limited by the incomplete understanding of underlying mechanisms. Here, we report a novel...
Optical spectroscopy is a fundamental tool in numerous areas of science and technology. Much effort has focused on miniaturizing spectrometers, but thus far at the cost spectral resolution broad operating range. Here we describe compact spectrometer that achieves both high bandwidth. The device relies imaging multimode interference from leaky modes along tapered optical fibre, resulting spectrally distinguishable spatial patterns over wide range wavelengths 500 to 1,600 nm. This fibre down...
Complex multiphase nanocomposite designs present enormous opportunities for developing next-generation integrated photonic and electronic devices. Here, a unique three-phase nanostructure combining ferroelectric BaTiO3 , wide-bandgap semiconductor of ZnO, plasmonic metal Au toward multifunctionalities is demonstrated. By novel two-step templated growth, highly ordered Au-BaTiO3 -ZnO in "nanoman"-like form, i.e., self-assembled ZnO nanopillars matrix, realized, very different from the random...
A novel three-dimensional (3D) framework with integrated lateral and vertical interfaces, enables the power of 3D strain tuning improves its electrical transport properties.
A method was developed for fabricating nanocrystalline microstructures. This involves synthesizing nanoparticles in a thermal plasma expanded through nozzle, and then focusing the to collimated beam by means of aerodynamic lenses. High-aspect-ratio structures silicon carbide titanium were deposited on stationary substrates, lines two-dimensional patterns translated substrates. Linewidths equalled approximately 50 μm. approach allows use much larger nozzles than previously micronozzle...
Heterointerfaces in manganite-based heterostructures either layered or vertical geometry control their magnetotransport properties. Instead of using spin-polarized tunneling across the interface, a unique approach based on magnetic exchange coupling along interface to properties has been demonstrated. By ferromagnetic La0.7Sr0.3MnO3 and antiferromagnetic NiO an epitaxial vertically aligned nanocomposite (VAN) architecture, dynamic reversible switch resistivity between two distinct biased...
This article presents key enhancements to CDMA2000 1/spl times/EV-DO systems embodied in Revision A. These provide significant gains spectral efficiency and substantial improvements QoS support relative 0. In particular, A approximately doubles the uplink number of terminals with delay-sensitive applications that can be simultaneously supported on system. It provides reduction latencies (approximately 50 percent) during both connection setup connected state. offers comprehensive network...
Vertically aligned nanocomposites (VAN) thin films present as an intriguing material family for achieving novel functionalities. However, most of the VAN structures tend to grow in a random fashion, hindering future integration nanoscale devices. Previous efforts ordered nanopillar have been focused on specific systems, and rely sophisticated lithography seeding techniques, making large area ordering quite difficult. In this work, new technique is presented produce self‐assembled with...
Self-assembled epitaxial BaTiO3:YMnO3 (BTO:YMO) vertically aligned nanocomposite thin films have been fabricated on SrTiO3 (001) substrates using pulsed-laser deposition. A room temperature multiferroic response has demonstrated in the films. Enormous strain generated both phases (e.g., 1.4% compressive BTO and 6.8% tensile YMO out-of-plane) because of large lattice mismatch. By tuning deposition frequency, microstructure are tailored, which leads to property It is found that plays an...
The ability to control the morphology of heterointerfaces with coupled functionalities is fascinating from both fundamental and technological perspectives. Here, using BiFeO3:CoFe2O4 vertically aligned nanocomposite (VAN) films as a model system, we demonstrate simple effective method modulate heterointerface its in pulsed laser deposition. By tuning deposition frequency through thickness during film growth, straight gradient have been achieved. modulated strongly correlated strain interface...
Vertically aligned nanocomposite (VAN) (La0.7Sr0.3MnO3)1−x:(CeO2)x (LSMO:CeO2) thin films have been grown on SrTiO3 (001) substrates by pulsed laser deposition. Tunable magnetoresistance properties as well microstructures are demonstrated in these VAN modulating the film composition (x = 0, 0.3, 0.4, 0.45, 0.5, and 0.55). The sample of x 0.3 shows a large low-field (LFMR) high temperature range, i.e., over 10% at range 280 K to 320 under 1 T with peak value ∼13.5% 310 K. In addition, vast...
Bi2FeMnO6 (BFMO) thin films with both conventional pseudocubic structure and novel supercell have been grown on SrTiO3 (001) substrates different thicknesses of CeO2 buffer layers (ranging from 6.7 to 50.0 nm) using pulsed laser deposition. The correlation between the thickness layer BFMO shows that layer, as nm, is sufficient in triggering structure. This may be ascribed interfacial strain which also serves a seed layer. found critical control microstructure magnetism formed structures....
Strong exchange bias (EB) in perpendicular direction has been demonstrated vertically aligned nanocomposite (VAN) (La0.7Sr0.3MnO3)1−x : (LaFeO3)x (LSMO:LFO, x = 0.33, 0.5, 0.67) thin films deposited by pulsed laser deposition. Under a moderate magnetic field cooling, an EB as high ∼800 Oe is achieved the VAN film with suggesting great potential for its applications density memory devices. Such enhanced effects can be attributed to quality epitaxial co-growth of ferromagnetic LSMO and...
(La0.7Sr0.3MnO3)0.67:(CuO)0.33 (LSMO:CuO) nanocomposite thin films were deposited on SrTiO3 (001), LaAlO3 and MgO (001) substrates by pulsed laser deposition, their microstructure as well magnetic magnetoresistance properties investigated. X-ray diffraction (XRD) transmission electron microscopy (TEM) results show that LSMO:CuO grow highly textured self-assembled vertically aligned (VAN), with a systematic domain structure strain tuning effect based the substrate type deposition frequency. A...
Metallic nanostructures within ceramic matrices provide a unique platform for integrating magnetic, optical, and electrical properties device applications. Currently, hurdles still exist the integration of metallic conventional devices, including incompatible growth conditions between metals ceramics control overall physical properties. In this study, we demonstrate tunability one-step method to fabricate magnetic embedded an oxide matrix, La0.5Sr0.5FeO3:Fe, from composite target using...
We demonstrate an infrared spectrometer based on waveguide-coupled nanocavity filters in a planar photonic crystal structure. The input light is coupled into the waveguide, from which spectral components are dropped cavities and radiated off-chip for detection commercial InGaAs camera. has footprint of only 60 μm by 8 μm. resolution about 1 nm operation bandwidth 1522–1545 nm. By substituting membrane material structure parameters, this design can be easily extended visible regime developed...
The dielectric properties of epitaxial BaFe12O19 hexaferrite thin film have been investigated as a function frequency (50 Hz − 2 MHz) and temperature (100–375 K). dependent permittivity, impedance () modulus spectra show that the responses are thermally activated. activation energy (E a) is much smaller than polycrystalline bulk BaFe12O19. In addition, E increases with increasing there distribution relaxation time in sample. scaling behavior sample further suggest independent at low...
The magnetodielectric (MD) effects of epitaxial hexaferrite BaFe10.2Sc1.8O19 thin film have been investigated around room temperature. frequency dependent dielectric constant and MD analysis at temperature show that in the low regime (f <100 Hz), effect exists, but it is very small. When higher than 1 kHz, two strong peaks exist which should be contributed by magnetic field sample/electrode interface polarizations (1 kHz < f 100 kHz) electric dipole rotations > kHz),...